Which of the following statements about adding oil to a system is true?
a) Oil is added by charging it into the crankcase.
b) Because the crankcase is pressurized it is not possible for air to get in the system when adding oil.
c) Oil cannot be added while the compressor is in operation.
d) The system must be recharged, purged and depressurized after the oil has been added.
e) None of the above.
Answer: A